What should be paid attention to in the secondary maintenance of automobiles?

1. Reasonable maintenance costs.

According to the requirements of automobile manufacturers, the special service stations of various brands of automobiles should hang the charging standards of various projects, maintenance man-hours at all levels, materials and parts in the business hall, so that customers can fully understand the consumption situation.

2. an engine.

The secondary maintenance of the car needs to check the engine idling, medium speed and high-speed operation, and whether the cylinder pressure and vacuum degree meet the standards. Compared to the first level of repair, the inspection of this item is relatively good.

3. Clutch.

The purpose of this project is to test the convenience, stability and reliability of the clutch operation, to ensure that the clutch operation is convenient and normal, and there is no oil leakage in the hydraulic system. Give the driver better access to the clutch.

After a long period of use (about 30,000km for 12 months), the car must be comprehensively inspected and adjusted to ensure that the safety, power and economic performance meet the requirements of use. Level 2 maintenance is a more thorough technical maintenance operation for the car. In addition to the first-level maintenance work, the content of the operation is mainly to inspect and adjust, disassemble and inspect the tires, and carry out tire rotation.

In order to prevent the early damage of the car and ensure the normal technical condition and use of the car, before the secondary maintenance, the automobile must be detected, diagnosed and technically evaluated, understand and master the technical condition and wear of the car, and determine the additional operation or minor repair items according to the diagnosis results, combined with the secondary maintenance. This level of maintenance is carried out by professional maintenance personnel. In maintenance, due to the different structures of various vehicles, the difference in manufacturing quality, and the different use of vehicles, their maintenance items and requirements are also different.

Therefore, the maintenance operation should be arranged according to the regulations of the manufacturer, so as to avoid unnecessary waste and damage to the parts. Engine inspection: mainly check the acceleration and deceleration performance of the engine; Smoke exhaust and leakage of the engine.

Inspection method: test run or instrument testing. Drivetrain Inspection:

Mainly check the working performance of the clutch; Check the internal fit of the transmission, the sealing of the transmission and the final reducer; Check the operating temperature of the transmission and reducer; Check the system for abnormal noises. Inspection method: test run or equipment inspection.

Braking system: mainly check the efficiency of the main braking system and the hand braking system; Check the braking system for leaks. Inspection Method:

Test run or equipment inspection. Steering system inspection: mainly check the free travel of the steering wheel and the performance of the steering system; Check the steering system for leaks.

Testing method: test run or equipment inspection. Driving system detection:

Mainly check for abnormal wear of tires; Check the wear condition of the suspension bushing; Check whether the bolts of the body are loose, corroded and deformed; Inspect the exterior of the body for rust and paint stripping. Detection method: Appearance inspection.

Electrical device detection: mainly check the instrument signal, oil pressure, water temperature, generator charge and discharge indication. Detection Method:

Test run or equipment inspection.

Precautions for secondary maintenance of automobiles 1: engine; Automotive Level 2 maintenance needs to check the condition of the engine at idle, medium and high speeds, as well as whether the cylinder pressure and vacuum level meet the standards. And whether the indicators of the engine after passing the three cleaning and three filtration operations meet the specifications.

The inspection of this item is more delicate than the level 1 maintenance.

Precautions for secondary maintenance of automobiles 2: clutch; This project is to test the convenience, smoothness and reliability of the clutch operation, to ensure that the clutch is convenient to use, no clothing length, and there is no oil leakage in the hydraulic system. Let the driver use the clutch better.

Precautions for secondary maintenance of automobiles 3: tires; Check whether the tire pressure is normal, and whether the tire texture is mixed with impurities such as gravel that are easy to hurt the tire, and detect whether the tire is aging and bubbling. It is also necessary to check whether the tires are rubbing against the chassis floor during normal operation.

Precautions for secondary maintenance of automobiles 4: vehicle inspection; This project is to inspect the overall condition of the car, such as cracks in the frame, loose screws, lighting activation, and abnormal noises when driving. If found, it is immediately checked, adjusted and eliminated.

Make sure the vehicle is running properly.

Except for Level 1 maintenance operations. It is mainly to inspect and adjust the safety components such as steering knuckles, steering rocker arms, brake shoes, and suspensions that are easy to wear or deform after a certain period of time, and disassemble and inspect tires, carry out tire transposition, check and adjust the working conditions of the engine and exhaust pollution control devices, etc., and the maintenance company is responsible for the vehicle maintenance operations.

Daily maintenance is daily maintenance, is the operation before the car, driving, after the car, the driver is responsible for the implementation, the content of the operation center is cleaning, supply and safety inspection, is to maintain the normal working condition of the vehicle regular, necessary work. The first-level maintenance is carried out by a professional maintenance company, and the content of the operation center is mainly cleaned, lubricated and fastened in addition to daily maintenance operations, and the safety components such as braking and manipulation are checked. The secondary maintenance is carried out by the professional maintenance enterprise, and the content of the operation center is mainly inspected and adjusted in addition to the first-level maintenance operation, and the tires are dismantled and inspected, and the tires are transposed.

Before the secondary maintenance, the detection and diagnosis and technical assessment should be carried out, and according to the results, the additional operations or minor repair items should be determined, and the secondary maintenance should be carried out together. The interval of maintenance at all levels depends on the type of vehicle and operating conditions.

Road transport vehicle maintenance management regulations: secondary maintenance is the vehicle maintenance operation carried out by the maintenance enterprise. In addition to the first-level maintenance operation, the content of the operation center is mainly to inspect and adjust the safety parts such as steering knuckles, steering rocker arms, brake shoes, suspensions, etc., which are easy to wear or deform after a certain period of use, and disassemble and inspect the tires and carry out tire rotation.

Level 2 maintenance must be performed on a regular basis.

Level 2 maintenance: carried out by professional maintenance workers in the repair workshop or professional maintenance workshop. The interval mileage is generally 10000 15000km. In addition to the first-level maintenance operation, the content of the operation center is mainly based on inspection and adjustment, and the tires are dismantled and inspected, and the tires are transposed.

Secondary maintenance, customarily referred to as the second guarantee. In addition to the primary maintenance work, it is necessary to replace the three filters (i.e., oil filter, fuel filter, and air filter), check and adjust the engine, braking system, and electrical equipment, and perform tire rotation.

This part of the work is more professional and is generally carried out by professional maintenance workers. In addition to the implementation of the first level of maintenance of the operation, the second guarantee also added the following items: (1) use the electronic fault diagnostic instrument to check the fault system, if there is a fault in a certain part of the car should be reported to the owner, timely repair.

2) The comprehensive engine tester is gradually being promoted to comprehensively test the characteristics of the engine, so as to determine the items that need to be overhauled and adjusted. (3) Check the cylinder pressure, and when possible, a non-disassembly cleaner should be used to clean the oil circuit of the engine to remove carbon deposits, grease and cement. (4) Clean the carburetor and fuel pump, and adjust it on the test bench if necessary.

5) For diesel engines, check and adjust the fuel injection pressure, fuel injection volume and balance of each cylinder of the oil pump on the oil pump test bench, and check and clean the fuel injection nozzle. (6) Inspect, clean and adjust the wiring and various components of the electrical system, and the rotating parts such as generators and starters should be lubricated as needed. (7) Check each assembly on the chassis, whether the moving parts are worn, and replace the worn parts; When the lubricating oil is insufficient or contaminated, it should be replenished or even replaced.

8) Check and adjust the 4-wheel alignment. (9) Detect and adjust instruments and lights. Inspect the functionality of air conditioning and heating units.

10) Check the integrity of the doors and windows, seats, door locks, glass regulators and various switches of the cab. (11) Check the tire pressure and wear, and transpose or replace it according to the regulations. Secondary maintenance is a more comprehensive inspection, through which it exposes and solves the existing faults to ensure that the components of the car and the performance of the whole vehicle are in a normal state, which plays a very important role in the maintenance of the car.

However, the most common problem is that the repairman often only replaces the three filters, changes the oil, and makes a perfunctory inspection, which is far from the requirements of secondary maintenance. In addition to checking with a comprehensive engine inspector, some auto repair shops still have certain difficulties, and it is necessary for car owners to supervise the repair shops to fully complete the specified operations. Secondary maintenance is a more comprehensive inspection, through which it exposes and solves the existing faults to ensure that the components of the car and the performance of the whole vehicle are in a normal state, which plays a very important role in the maintenance of the car.

However, the most common problem is that the repairman often only replaces the three filters, changes the oil, and makes a perfunctory inspection, which is far from the requirements of secondary maintenance. In addition to checking with a comprehensive engine inspector, some auto repair shops still have certain difficulties, and it is necessary for car owners to supervise the repair shops to fully complete the specified operations.

Level 2 maintenance is the maintenance of a vehicle that is carried out by a repair company. In addition to the first-level maintenance operation, the judgment content of the operation center is mainly to inspect and adjust the safety components that are easy to wear or deform after a certain period of time, such as steering knuckles, steering rocker arms, brake shoes, suspensions, etc., and disassemble and inspect the tires and carry out tire rotation. Level 2 maintenance must be performed on a regular basis.

The envy of the secondary maintenance of automobiles is mainly based on inspection and adjustment.

Content. 1) Replace the oil in the oil pan, and clean the oil pan, oil pump and filter collector with kerosene.

2) Check and adjust the valve clearance.

3) Tighten the bolts of the cylinder head, intake and exhaust manifolds and mufflers. And check whether the liner is in good condition in the above parts, and if there is a problem with the gasket, it should be replaced in time.

4) Check the clutch and adjust the free stroke of the clutch pedal as needed.

5) Check the tightening of the transmission and the gear shift mechanism. Add or change gear oil and clean the breather plug.

The purpose of the secondary maintenance of the car is to inspect and adjust, in addition to the implementation of all the items of the primary maintenance, the following items should be carried out: change the oil of the oil pan, and use kerosene.

Clean the oil pan, oil pump and filter, check and adjust the valve clearance, etc.

Except for Level 1 maintenance operations. It is mainly to inspect and adjust the safety components such as steering knuckles, steering rocker arms, brake shoes, and suspensions that are easy to wear or deform after a certain period of time, and disassemble and inspect tires, carry out tire transposition, check and adjust the working conditions of the engine and exhaust pollution control devices, etc., and the maintenance company is responsible for the vehicle maintenance operations.

As a consumable product, in order to maintain its excellent performance, the car generally has to enter the factory for secondary maintenance every 7,500-10,000 kilometers. The main contents are:

1. After the engine passes the three cleaning and three filtration operations, it should be easy to start, run smoothly, exhaust normally (referring to the exhaust gas up to standard), water temperature, oil pressure meet the requirements, stable speed, no abnormal noise, moderate tension of each belt, and no four leaks (water, oil, electricity, gas).

2. The direction of free travel and toe meet the requirements, the steering is light, flexible and reliable, and the front wheel has no left and right swing head and deviation when driving.

3. The free stroke of the clutch meets the requirements, the operation is convenient, the separation is thorough, the combination is stable and reliable, there is no abnormal noise, and the hydraulic system.

No oil leakage. 4. a gearbox.

Drive axles, universal joints.

or half shaft) transmission device and other well-lubricated, reliable connection, no abnormal noise and overheating, no jumping, flexible shifting, no oil leakage.

5. a brake pedal.

Free stroke and brake intermittent meet the requirements, driving and parking brakes.

Good, no deviation during braking and lag during braking, proportional valve of inertia.

Works normally and does not leak oil.

6. The tire pressure is normal (the high and low pressure standards specified by different models are different).

7. The cantilever and shock absorption are fixed and reliable, the function is normal, and the temperature of the hub bearing is not high after driving.

8. Generators, starters, lights, instruments, signal lights, buttons, and switches are fully equipped and complete and can work normally.

9. Fill lubricating oil at each lubrication point of the whole car.

10. Rinse and clean the whole car.

What is the secondary maintenance of a car? The secondary maintenance of the car is the oil in various parts of the car, and the brake pads need to be changed.

It is mainly to inspect and adjust the safety components such as steering knuckles, steering rocker arms, brake shoes, and suspensions that are easy to wear or deform after a certain period of time, and disassemble and inspect tires, carry out tire transposition, check and adjust the working conditions of the engine and exhaust pollution control devices, etc., and the maintenance company is responsible for the vehicle maintenance operations.